Topical Questions
These questions are keyed to major topics in the chapter. Usually a question that is answered at the back of the book is paired with a similar one that is not.
Lactic acid, C3H6O3, occurs in sour milk as a result of the metabolism of certain bacteria. Calculate the pH of a solution of 56. mg lactic acid in 250. mL water. Ka for lactic acid is 1.4 × 10-4.
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